Roast Poblano pepper under broiler until skin is black, put in paper bag for 10 minutes to sweat. In the meantime roast sweet potato in 365 degree oven until soft (about 30 minutes). Using a paper towel pull blackened skin off of the pepper, core and strip seeds out and slice into strips. You can do these steps earlier in the day or night before for faster dinner prep later. Mash sweet potato in a bowl with salt, pepper, paprika and a little chili powder. Drain black beans and rinse. Heat all these items in the microwave if they are cold. Butter a tortilla on one side and set buttered side down on a plate, on ONE HALF of the UN-buttered side of the tortilla, spread the sweet potato, layer black beans, Poblano pepper strips, green chilies, fresh spinach and Jack cheese. Set buttered side down tortilla in medium heated large frying pan and fold over. Fry until tortilla turns golden brown and then flip over and brown other side, by that time the cheese has melted. Slice into wedges. Serve with your choice of low fat sour cream, salsa or sliced avocado.