Sweet Potato and Red Lentil Soup (Vegan)

olive oil

onion (diced)

medium sweet potato (cut into 1cm cubes)

medium carrots (cut into 1cm cubes)

small parsnips (cut into 1cm cubes)

bell peppers ((I like to use 1 red and 1 yellow), cut into bitesize pieces)

garlic (crushed or grated)

cm ginger (grated)

dried chilli flakes

red lentils

hot vegetable stock (or chicken stock, or water)

Salt and pepper