You could do soup or shrimp for the started. Shrimp is super easy as you can buy it in bags at the super market and just cook them at home. You could serve them cold with marie-rose sauce (ketchup, mayo and salad cream mixed together) on lettuce with a sprinkle of paprika, or you could bread them by using flour egg and breadcrumbs with herbs before you cookthem and then serve them hot from the oven. For the main Lasagne is always an easy option but i dont know how often you have that. You could do some roast beef with roast veg, or you could fry some steak onions, mushrooms and serve with mashed potato.
For dessert you could do something like pavlova. Its really simple you just have to make mini meringue nests and cook them in the oven. When they have cooled, top them with whipped cream and chopped up strawberries and kiwis.