01 - Preheat the oven to 425°F. Prepare fries according to package directions, or toss fresh-cut fries with oil and salt, then bake 25–30 minutes until golden and crisp.
02 - While fries bake, heat a large skillet over medium-high. Add ground beef and cook until browned, breaking up with a spatula, about 5 minutes. Drain excess fat if needed.
03 - Add onion and garlic to beef; sauté 2–3 minutes until onion softens.
04 - Sprinkle in taco seasoning and add water. Stir well and simmer 3–4 minutes until thickened.
05 - Once fries are ready, transfer to a large oven-safe platter or baking sheet. Sprinkle half the cheeses over fries, then top evenly with taco beef. Add remaining cheese on top.
06 - Return to oven for 5–8 minutes until cheese is melted and bubbly.
07 - Remove from oven. Top with tomato, green onions, cilantro, jalapeño, sour cream, and guacamole as desired.
08 - Serve hot and enjoy immediately.