Ground Beef Tostadas

Ingredients

• 1 lb ground beef
• 1 tablespoon olive oil
• 1 teaspoon ground cumin
• 1 teaspoon garlic powder
• 1 teaspoon onion powder
• 1 teaspoon chili powder
• 1/2 teaspoon paprika
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper
• 1/4 cup water
• 8 tostada shells
• 1 cup shredded lettuce
• 1/2 cup diced tomatoes
• 1/2 cup shredded cheddar cheese
• 1/4 cup sour cream
• 1/4 cup salsa