Tuesday Bistec: 15-Minute Flank Steak with Pasilla-Tomato Sauce
Growing up, my abuela's bistec en pasilla meant it was Sunday. That rich, earthy guisado would bubble away in a heavy clay pot while we ran in and out of the kitchen, stealing hot tortillas right off the comal. It is a sacred food memory, but let's be real: I do not have three hours on a Tuesday before someone starts asking for a snack. That is exactly why I created this 15-Minute Flash-Seared Flank Steak. What makes this recipe so special to me is how it bridges that deep Oaxacan soul with my Brooklyn reality. We flash-sear thinly sliced flank steak so it stays ridiculously tender, then deglaze the pan with a 3-minute blender sauce made from a quick-toasted pasilla chile and tomatoes. The smoky sauce clings to the beef like an absolute dream. To keep it weeknight bright, we balance all that richness with a loud, unapologetically acidic cabbage and radish crunch. Going Bodega Mode? Toss in a can of fire-roasted diced tomatoes. Got a Mexican market nearby? Char fresh Romas. Taste it—then decide if you want an extra squeeze of lime or a pinch of salt. Remember, we are not suffering for dinner tonight. Ándale, grab your tortillas!
Featured Recipe
15-Minute Flash-Seared Flank Steak with Pasilla-Tomato "Bistec" Sauce + Limey Radish Crunch
Bistec en pasilla is the kind of rich, earthy guisado that normally takes a Sunday afternoon to build, but we are making it on a Tuesday. We flash-sear thinly sliced flank steak so it stays ridiculously tender, then deglaze the pan with a 3-minute blender sauce made from a toasted pasilla chile and fire-roasted tomatoes. The smoky sauce clings to the beef, and we balance that richness with a bright, unapologetically acidic cabbage and radish crunch. Real flavor, real life—we're not suffering for dinner tonight.
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Timeline
Ingredients
- 1 lb flank steak, sliced very thin against the grain(Slicing against the grain is non-negotiable for tender flash-seared steak!)
- 1 tbsp soy sauce(My Brooklyn umami shortcut for beef)
- 1 tsp kosher salt(Divided use)
- 1 dried pasilla chile(Destemmed and seeded. Swap: ancho chile, or 1 chipotle in adobo for Pantry Mode)
- 1 can (14.5 oz) fire-roasted diced tomatoes(Do not drain)
- 2 cloves garlic(Peeled)
- 1/4 medium white onion(Roughly chopped)
- 1/2 tsp ground cumin
- 2 tbsp avocado oil(Or any neutral, high-heat oil. Divided use.)
- 2 cups shredded cabbage(Green or red, whatever you have)
- 4 radishes(Thinly sliced)
- 2 limes(1 juiced for the slaw, 1 cut into wedges for serving)
- 1/4 cup fresh cilantro(Roughly chopped)
- 8 corn tortillas(Warmed (Bodega Mode or fresh))
- 1/4 tsp kosher salt(Used in step 3)
Instructions
- 1
Toss the sliced 1 lb flank steak, sliced very thin against the grain in a bowl with 1 tbsp soy sauce and 1/2 tsp kosher salt. Set aside. Heat a large dry skillet over medium heat. Rip the stem off 1 dried pasilla chile, shake out the seeds, and press it flat into the dry skillet for about 30 seconds per side until fragrant and slightly pliable.
2 min
Tip: Don't let the chile turn black, or your sauce will taste like bitter ashes. Just wake it up!
- 2
Throw the toasted chile directly into a blender along with 1 can (14.5 oz) fire-roasted diced tomatoes (juices and all), 2 cloves garlic, 1/4 medium white onion, and 1/2 tsp ground cumin. Blend on high until completely smooth.
2 min
Tip: If the sauce feels too thick, add just a splash of water. This is our 'Bistec' shortcut base.
- 3
While the sauce hangs out, grab a bowl and quickly toss together the 2 cups shredded cabbage, 4 radishes, the juice of 1 limes, 1/4 cup fresh cilantro, and 1/4 tsp kosher salt. Give it a scrunch with your hands to slightly bruise the cabbage.
3 min
Tip: This is our texture contrast! The acid cuts right through the smoky, rich beef.
- 4
Wipe out the skillet you used for the chile and crank the heat to high. Add 1 tbsp avocado oil. When the oil shimmers and almost smokes, add half the flank steak in a single layer. Let it sit totally undisturbed for 1 minute to get a dark crust, then flip and toss for 30 seconds. Remove to a plate. Add the remaining 1 tbsp avocado oil and repeat with the rest of the steak.
5 min
Tip: You're going to do this in batches! Overcrowding the pan boils the meat, and nobody likes gray, chewy steak.
- 5
Turn the heat down to medium. Pour the blender sauce directly into the hot, beef-dripping skillet (careful, it will splatter!). Stir and scrape up all the browned bits from the bottom. Let the sauce bubble and reduce until it thickens slightly and darkens in color. Taste it—then decide. Season with the remaining 1/4 tsp kosher salt if needed.
4 min
Tip: Frying the salsa in the leftover beef fat is the most important flavor logic in this whole dish.
- 6
While the sauce thickens, heat up your 8 corn tortillas. Wrap them in a damp paper towel and microwave for 45 seconds, or warm them directly over a gas flame.
2 min
Tip: A cold tortilla will ruin a hot taco. Ándale, warm them up!
- 7
Toss the resting steak (and any juices on the plate) back into the skillet with the thickened sauce. Stir just until the beef is coated and heated through—about 30 seconds. Turn off the heat. Serve immediately with the crunchy slaw, warm tortillas, and the remaining 1 limes cut into wedges.
1 min
Tip: Do not let the steak cook any further; we just want it to wear the sauce like a tailored jacket.
Chef's Notes
Pantry Mode: If you don't have a dried pasilla or ancho chile, drop 1 canned chipotle pepper in adobo right into the blender instead of doing the dry-toast step. It makes the dish a little punchier but keeps that deep, smoky backbone intact. Also, if your flank steak pieces are long, cut them in half before slicing against the grain so they fit nicely in a taco!
María “Mari” Santiago
Oaxacan comfort, Brooklyn shortcuts, weeknight bright.
María “Mari” Santiago was born in Oaxaca, where her earliest kitchen memories are measured in scent: chiles toasting on a comal, cinnamon and chocolate blooming in mole, and the warm, nutty snap of a tlayuda folded in half for the walk home. She learned by watching—first her tías, then her abuela—picking up the small, practical rules that never made it into written recipes: how to tell when the garlic is *just* right, how to rescue a too-spicy salsa, and why you always taste the broth before you add the salt. Now in Brooklyn, Mari cooks the food she grew up on while raising two little kids and juggling real-life time limits. Her style is “real flavor, real life”: traditional Oaxacan and everyday Mexican dishes—moles, caldos, frijoles, enfrijoladas, salsas, and crispy tlayudas—made weeknight-friendly with smart shortcuts, brighter salsas, and more vegetables without losing the soul of the dish. She’s not precious about rules, she’s big on swaps, and she’s on a mission to prove that you can cook deeply flavorful Mexican food with what you can actually find at a normal grocery store (and still get dinner on the table before a meltdown). Mari’s recipes read like a friend texting you from the produce aisle: clear, funny, and unpretentious, with a side of abuela wisdom. If there’s a hard-to-find ingredient, she gives you a realistic alternative, tells you what will change (and what won’t), and keeps the focus where it belongs—on food that tastes like home, even when home is a small Brooklyn kitchen.