Thoroughly rinse 4 chard leaves and set aside.
Preheat oven to 415º and line a baking sheet, or two if necessary, with parchment.
Peel and chop sweet potatoes into 1/2" chunks. In a large bowl, toss with olive oil and seasonings. Arrange on baking sheet and bake for 30 minutes, tossing occasionally. They are done when they're fork tender.
Drain beans and mix with salt and garlic powder.
Mash avocado and mix in salt and pepper.
Chop red pepper into thin slices or dice it, if you prefer.
Use the back of a spoon to spread mashed avocado on the leaf, then spoon beans and sweet potatoes on top. Add onion and cilantro and wrap it all up!