Step 1

Preheat oven according to taco shell package directions. Lay taco shells on a sheet pan in an even layer. When hot, bake shells for 6-7 minutes.

Step 2

Meanwhile, heat a large skillet over medium heat. Add the canola oil, swirl to cover pan then add the onion and sauté 2-3 minutes until onions have softened and become translucent.

Step 3

Add the garlic and sauté 30 seconds more. Add the beans, spices, tomato paste and water and mix until combined.

Step 4

Cook about 3 minutes to allow flavors to meld and beans to heat through.

Step 5

In a small bowl, mash avocado with a fork until smooth. Add lime juice, salt and pepper.

Step 6

Place taco shells on a flat surface. Layer each shell with 1/8 of the bean mixture, then the cheese, mashed avocado, tomatoes and lettuce. Serve immediately.