Prepare the Lentils: Cook them according to the package instructions, usually by simmering them in water for about 20-25 minutes. Drain any excess water.
Prepare the Toppings: While the lentils are cooking, dice the tomatoes and red onion and chop the lettuce.
Assemble the Tacos: Warm the tortilla(s). Add a generous scoop of cooked lentils to the center of each tortilla—top with guacamole, diced tomatoes, red onion, chopped lettuce, and a sprinkle of cilantro.
Seasoning: If using taco seasoning, add it to the cooked lentils and stir well. Alternatively, sprinkle chili powder, cumin, or garlic powder for a homemade seasoning.
Notes
No Lentils: Can use ground beef instead
No taco seasoning: Add seasonings to lentils, such as chili powder, cumin, and/or garlic powder.