Since it's winter, I've recently tried making soups. I've found one particular recipe that I love. It's two sweet potatoes peeled and diced, two chopped carrots, a red bell pepper roughly chopped, an onion peeled and roughly chopped, half a cup of dried red lentils, a heaped teaspoon of garlic powder, pinches of salt and pepper, and around a third of a teaspoon of chili flakes, all added to around 4 cups of vegetable stock and cooked for 4-6 hours in a slow cooker (though I reckon you'd be fine to boil it on the stove for a few hours too). It's slightly thicker than some soups and very homely-feeling, and the chili flakes add a nice heat that's great for winter.
I also tried a cheese and broccoli soup recipe recently. It was a great recipe, but I spoiled it a little by adding slightly too much cheese, making it a bit sickly. I'm gonna try it again soon though - I'll post the results here when I do!