Crunchy taco shells wrapped in melty cheese and a pillowy chalupa shell, then stuffed with taco seasoned ground beef, homemade baja sauce, shredded lettuce, and more cheese.
Make the Baja Sauce: Add mayo, sour cream, red bell pepper, garlic, and lime juice to a food processor. Blend until smooth, adjust seasoning to taste, then refrigerate until ready to use.
Cook Beef: In a skillet over medium-high, cook ground beef until browned and crumbled. Drain grease, add taco seasoning and water, then simmer for 4–5 minutes longer.
Prepare Shells: Warm chalupa shells in oven, skillet, or air fryer. Sprinkle most of the cheese (save some for topping) over each chalupa shell and melt under a broiler. Once melted, press a hard taco shell into the melted cheese, folding chalupa around it. Hold briefly so it sticks.
Assemble: Fill each shell with seasoned beef, drizzle with Baja sauce, top with shredded lettuce, and finish with the remaining cheese. Serve immediately.
Notes
Use a utensil or light weight plate to hold assembled shells in place while working on the other shells.