In a large skillet brown lean ground beef for 4 – 5 minutes. Add finely diced onion, diced tomato, chili powder, garlic powder, and cumin. Stir together and continue cooking until beef is cooked through. Remove from heat. Food safety note: ground beef should be cooked to a minimal internal temperature of 160 degrees Fahrenheit.
On two large baking sheet, unroll crescent rolls and press seams together to make one large sheet. Cut sheet into 8 squares. Divide beef mixture evenly among all 8 dough squares and top with shredded cheese. Pinch crescent roll around filling and to make a cup (or boat!) to hold filling in.
Bake at 375 degrees for 12 minutes or until golden brown.