For the overnight oats: Remove pre-soaked oats from refrigerator. Separate into bowls and top with bananas and strawberries.
For the chicken salad sandwiches: Shred the leftover chicken using 2 forks. In a medium bowl, mix together the mayo, mustard, garlic powder, onion powder, salt and pepper. Stir in celery and chicken. Scoop some chicken salad on 4 slices of bread, top with cheese, lettuce and tomato and remaining bread slices.
For the spaghetti: Bring a pot of water to boil, add salt and then pasta and cook until al dente. In a saucepan, add the garlic and oil and cook over medium-low heat for 1 to 2 minutes. Stir in tomatoes and simmer while the pasta cooks. Toss the pasta with warm sauce and top with cheese.
For the garlic bread: Preheat the oven to 400 degrees. Mix the butter and garlic. Cut the bread in half lengthwise and spread the butter on both sides. Wrap the bread in tin foil and bake in the oven for 20 minutes. Serve alongside spaghetti.