Use tongs to toast each tortilla over a low flame. Toast just until crispy and the tortilla starts to char. Set aside.
Heat 1 tbsp. oil in a skillet over medium heat. Add plant based chorizo and cook 6-8 minutes, or until it starts to brown. Remove and set aside.
Wipe out pan and add 1 tbsp. olive oil to the skillet. Add peppers and onions, cooking for 5 minutes, or until peppers and onions soften. Remove and set aside.
Wipe out the skillet once more and add the refried beans. Cook for 2-3 minutes, or until warmed through.
Start layering the tostadas by spreading on a layer of beans. Then, follow with the plant based chorizo, and bell peppers and onions.
Top with shredded veggies, your favorite hot sauce, salsa, avocado crema, or guacamole and serve!