J-Lyn's Awesome Salmon Casserole

Ingredients (9)

• ✓ 1 tablespoon butter, or as needed
• + 1 cup elbow macaroni add to pantry
• + 1 (6 ounce) can salmon, drained add to pantry
• + 1 (10.75 ounce) can condensed cream of mushroom soup add to pantry
• ✓ ⅔ cup milk, or to taste
• + ½ cup grated Parmesan cheese add to pantry
• + 1 teaspoon salt add to pantry
• ✓ 1 teaspoon ground black pepper
• + ¼ cup French-fried onions add to pantry