In a large skillet over medium-high heat, brown the ground beef. Add taco seasoning and water, then simmer until thick and well combined.
In a bowl, mix the cooked rice with salsa and ground cumin until evenly combined.
Warm the flour tortillas for about 20 seconds so they are soft and pliable.
Layer rice, seasoned beef, nacho cheese sauce, sour cream, chipotle sauce, and tortilla strips in the center of each tortilla.
Fold in the sides and roll each tortilla tightly into a burrito.
Sprinkle shredded cheese on a flat surface and press each burrito into the cheese, coating the outside.
Melt butter in a skillet over medium heat. Grill burritos seam-side down, pressing gently, until the cheese is crispy and golden on all sides.
Let cool briefly, then slice in half and serve warm.