I made a delicious recipe one day and it's my new favourite for getting rid of stems from kale, chard, spinach etc. Don't throw them away!! People throw them out, did you know? It's crazy! Don't waste perfectly good food!
Steam the stems until partway cooked.
Blend fresh tomatoes into a sauce or use a can/bottle of passata.
Blend the two together in a casserole dish, top with cornmeal (my gluten free version) or breadcrumbs and grate cheese on top.
Bake until cheese in melty delicious and enjoy!