Ready made puff pastry is fab stuff .... I know it's lazy but I always have some in the freezer.
In the winter I use it to top pies, chicken and veg is a favourite in our house. I also use it to make tuna puffs for DS's packed lunch at school. Basically take two tins of tuna, mix with about 4 ounces of grated cheese and make up lots of triangular pockets, seal with milk and bake in the oven for about 10 mins. A Great way to use up left over chilli and curry too.
Basically usse it for any pastry that calls for puff paastry. Just amke sure you defrost it first.
Make a tart/pizza thing with anything you have to hand at all.
Roll out, score a border, prick inside. Spread base with pesto, tomato puree, jam (if doing a sweet thing). Chuck on meat, fish, cheese, veggies/fruit in any combo you like. Stick in the oven for 20 mins.
If you're doing it for snacks or guests cut individual portions first. Easy!
i roll out and top with the following thinly sliced leeks cooked in grain mustard & white wine cooked bacon cooked mushrooms top with grated cheese leave a cm gap around the edge pop in oven for 20-25 mins such an easy dinner but tastes and looks rather impressive (if i do say so myself!)
As a base for a million kinds of tarts/pizzas - roll out to the size of a baking sheet, score about 2cm from the edge on all sides, spread base with something (tomato paste, pesto, jarred pasta sauce, creme fraiche, olive tapende, etc), arrange anything you like on top (sliced veg (courgettes, aubergine, peppers, tomatoes particularly good), anchovies, olives, sun dried tomatoes, fried onions, slices of ham, pepperoni, bacon) and then bake for about 15 minutes. Take out of the oven and top with cheese (anything that will melt nicely works fine - mozzarella, gruyere, mild cheddar, blue cheese, brie, taleggio etc). Place back in oven till the cheese melts and the edges are brown. This is great for a kid's activity too because the pastry cooks so fast so it's ready really soon after kids make their own pizzas.
Make your own sausage rolls - take sausages out of their casings, mix with minced onion/mustard powder/garlic/herbs if you like, spread inside of puff pastry with grain mustard (optional), brush opposite edges of pastry with water to stick and roll up into long sausage. Snip into sausage roll size with scissors and place seam side down on a baking tray, brush top with egg, in oven till tops are dark golden and pastry is puffed up.
And there's always making things in pastry for dinner - salmon, cod, beef etc.