mine love pasta too- I started off doing pasta with tom ketchup and cheese and now I do proper pasta sauce with loads of veg- mushrooms, peppers, tomatoes and they love it.
Meatballs and pasta/spaghetti
Fish Pie (white fish/leeks/cheese sauce and mash on top)
Pizza- bought and home made (ds loves pizza toast- toast with pizza topping!)
Scrambled eggs and pancakes
DS also loves a 'fry up'- sausage, bacon, mushrooms, tomatoes, eggs and toast (mostly grilled)
I do lots of soup- lentil and vegetable, leek and potato, butternut squash
Cottage Pie
Salmon fillet lightly marinaded with veg and mash
Quiche and boiled potatoes and salad
Picnic style- mini sausages, bread sticks, cheese, pepper, carrot and cucumber sticks, apple, ham etc
Scampi
Fishcakes- bought and homemade
(mine are 2 and 3yrs and they eat all of these)