Cut a whole chicken to have three meals even 4 instead of 2. add a side : lentils/ chikpeas/any beans or a vegetable side : carrots/ string beans with rice or potatoes.
beans soup as a one pot meal. (either lentils or broadbeans or split peas)
lentils one sausage and potatoes
lentils sardines and rice
frozen casserole vegetable are cheap for the price they make a perfect stew in a crockpot and will help spread 400g of meat. 1 kilo will make a couple of large meals. you can use them to make soup too.
A tomato soup or a carrot soup does not require a lot of ingredients with a piece of cheese and bread it's a hearty meal.
buy carrots and potatoes in bulk and store the potatoes as best as you can :
Mix potatoes and carrots as a side cut thin to have a quick cooking, they go further then rice are more nutritious.
Always A block of cheese. Always eggs. Always cheap oil, the best quality you can afford.
When you do an omelette count one egg per person instead of three. we are not supposed to eat more then three eggs per week anyways. egg and rice is also a cheap meal.
Pasta pasta pasta. (bulk spaguetti, bulk
pasta, cheese and tomato sauce with nothing else has its merits. add garlic and spices and half a onion to the cheapest of sauce.
extra cheap spicy noodles with an egg can do it too.
always have mixed herbs, vegetable stock pepper salt and then either mustard or chopped tomatoes as a starter for a sauce, you can add the curry style.
find the time slot on the sunday were the supermarkets ditch their vegetables, pastries and bread for extra cheap (pences) then freeze the lot. fresh bread lasts a month in the fridge.
Pizza cost pence to make at home.
Breakfast : Or only porridge in the morning with fresh fruit.
My experience. Take good courage.
cakes : don't buy them make them. Chocolate cake easy peasy. Add 2 carrots or 2 apples to a pound cake recipe, that will make the batter go further with no pb, and it's actually healthier. Cupcakes are a better bet then a cake in one mould. A pound cake made with 4 eggs and 200g of carrots make for 18 cupcakes. (ask me how I know). Baked goods can be frozen up to a month.
master dhals and currys there is a lot of money saving there.
apart for the baking bit. the slow cooker will help you a lot : to have tasty meals economical meals and not being tied up to the kitchen at the same time.