In a medium bowl, mash avocado with the back of a fork until desired consistency. I prefer mine a little chunkier.
Stir in red onion, cilantro, lime juice, garlic powder and jalapeño for the guacamole until combined. Season with salt and pepper to taste.
To assemble the tacos, add 2 to 3 Tbsp of guacamole to each flour tortilla in the center of the tortilla.
Add even amounts of black beans, red bell pepper, yellow bell pepper, and poblano pepper to each tortilla.
Garnish with red pepper flakes and cilantro.
Serve with lime wedges.