Kid Friendly Tuna Noodle Casserole

300g spaghetti noodles, broken into pieces then cooked

1 (284 ml) can condensed cream of mushroom soup

284ml milk (use soup can to measure)

1 (170 g) can tuna in water, drained

1⁄4 cup onion , finely chopped

2 garlic cloves, crushed

250ml cheddar cheese, finely cubed. (1 cup)

1⁄4 cup parmesan cheese (grated)

salt and pepper