Macaroni with White Sauce

INGREDIENTS

• 1 1/2 (16 ounce) packages uncooked elbow macaroni
• 2 tablespoons vegetable oil, divided
• 2 cubes chicken bouillon
• 1 large onion, chopped
• 1 3/4 pounds ground beef
• 4 tablespoons tomato paste
• salt to taste
• ground black pepper to taste
•  
• 1/4 cup vegetable oil
• 3/4 cup all-purpose flour
• 3 cups milk
• 1/2 teaspoon ground white pepper
• 3 cups shredded mozzarella cheese