Easy Beef Enchiladas

Bahan-bahan (6 porsi)

• 1 tablespoon canola or vegetable oil
• 16 ounces lean ground beef
• 1½ cups finely diced onion
• 1½ cups finely diced zucchini ((about 2 medium))
• 12 taco-size corn tortillas ((heated or fried to soften))
• 2½ cups enchilada sauce ((canned or homemade))
• 3 cups shredded cheddar-jack cheese
• serve as desired with lettuce, sour cream, avocado, etc.