Prep the Slaw: In a large mixing bowl, whisk together the vegan mayo, agave, vinegar, salt, and pepper. Toss in the shredded cabbage until well-coated. Pop this in the fridge—the flavors develop while you cook the filling!
Sauté the Aromatics: Melt the vegan butter in a large skillet over medium heat. Add your diced peppers and onions. Sauté for about 3–4 minutes until they are soft and translucent.
Bloom the Spice: Stir in the minced garlic and all your dry spices (chili powder, onion powder, etc.). Cook for just 30 seconds. You’ll know it’s ready when the kitchen starts smelling incredible!
Build the Sauce: Add the tomato paste, tomato sauce, agave, mustard, and Worcestershire sauce. Whisk it all together until the sauce is smooth and bubbling.
Simmer and Serve: Stir in your pre-cooked lentils. Let everything simmer together for about 5 minutes so the lentils can soak up that savory sauce. Spoon a generous heap onto toasted buns, top with your chilled slaw, and dive in!