Highway 41 MPG Sweet Potato & Black Bean Tacos

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A vibrant vegetarian taco filling inspired by the 41 MPG highway efficiency of the 2014 Mazda 3 sedan, featuring smoky roasted sweet potatoes and protein-packed black beans. This mexican-inspired vegetarian ready in about 40 minutes pairs diced 1/2-inch cubes sweet potatoes, (15 oz), drained and rinsed black beans, finely diced red onion for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 320 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

★ 4.3 (9 ratings) Prep: 15 min Cook: 25 min Serves 4 Mexican cuisine 320 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 425°F (220°C). Toss 2 cups diced sweet potatoes with 1 tsp cumin, 1/2 tsp smoked paprika, and 1 tbsp water; spread on a parchment-lined baking sheet.
  2. Step 2: Roast for 20-25 minutes until tender and caramelized at the edges, stirring once halfway through.
  3. Step 3: While potatoes roast, heat a small skillet over medium heat; add 1/2 cup diced red onion and cook for 5 minutes until soft and translucent.
  4. Step 4: Combine roasted sweet potatoes, drained black beans, cooked red onions, and 1 tbsp lime juice in a bowl; warm tortillas in a dry skillet for 30 seconds per side.
  5. Step 5: Assemble tacos with sweet potato mixture, top with avocado slices, and drizzle with remaining lime juice.

Equipment for this recipe

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Frequently asked questions

How long does Highway 41 MPG Sweet Potato & Black Bean Tacos take to make?

Total time is about 40 minutes (15 min prep + 25 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover Highway 41 MPG Sweet Potato & Black Bean Tacos?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep finely diced red onion from drying out.

Can I substitute ingredients in Highway 41 MPG Sweet Potato & Black Bean Tacos?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale Highway 41 MPG Sweet Potato & Black Bean Tacos for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with Highway 41 MPG Sweet Potato & Black Bean Tacos?

Mexican vegetarian like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

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