easy classic tuna casserole

Ingredients For easy classic tuna casserole

• 1 c

  cooked and drained macaroni, elbows or shells
• 1/2 c

  chopped onion
• 1/4 c

  chopped green or red bell pepper
• 1 can

  condensed cream of chicken soup (or substitute cream of celery or mushroom)
• 2 Tbsp

  all purpose flour
• 1 1/2 c

  milk
• 1 can

  oil packed tuna, drained (5 ounce can)
• salt and pepper to taste
• 1/2 c

  slivered almonds, divided