My easy curry recipe is basically this:
Blend 3-4 medium sized tomatoes [or loads of cherry ones], an inch of ginger, 2-3 garlic cloves, 1 chilli and a medium onion in a blender, with some water. Set aside. If you have some fresh coriander you can pop some of that in before blending as well.
then in hot oil, preferable coconut but if not, veg oil; a teaspoon of mustard seed, a teaspoon of cumin seed until it starts to smell cuminy and the mustard seeds pop, then chuck in some curry leaves and then almost straight away some chopped onion. Then some chopped pepper and then if you like it, some quorn or tofu. Once that has cooked a bit, add turmeric, some ground coriander, some ground fenugreek and then cook for a minute or two, and then add some parboiled veggies eg potato, peas, carrots etc. Cook that for a few mins and then add the blended tomato mix, some salt and if needed, some water and let it cook down. You may need to add more salt but taste reasonably regularly and when the veggie are cooked through, pop some basmati rice on to cook for 12 mins, drain and rinse the rice, and plate up.