Place ½ cup Goya Mojo Chipotle in a food storage bag.
Cut pork in half crosswise; cut the thicker piece in half lengthwise.
Place pork in the bag, seal, and toss together until evenly coated.
Marinate for at least 20 minutes (can marinate refrigerated, for up to 8 hours).
Preheat grill to medium. Grill pork turning once, until temperature reaches 145℉ on an instant read thermometer (about 10 minutes).
Grill onion slices, brushing with marinade and turning once, until softened (about 10 minutes).
Let pork rest for 10 minutes and thinly slice crosswise.
Coarsely chop the onions.
Horizontally drizzle the Ancho Salsita to taste across the center of a tortilla. Spread in a 2-inch band.
Top with pork, onions, rice, beans, tomatoes and cilantro.
Fold the bottom edge of each tortilla up and over the filling. Fold opposite sides in over the filling and roll up from the bottom. Place seam-side down and serve warm with additional Salsita and sour cream.