Complete the Tomato Soup recipe with the given verbs (cook,slice,put,serve,chop,add(2),fry,mix,heat,peel,wash)
_____ the onions and _____ into rings. _______ butter in a thick frying pan, _______ the onions, and ______they are just turning golden. _______ the stock,salt and peper into a saucepan. _______ and ________ tomamtoes. _______ the chopped tomatoes and the onions. ________well. ________for 10 minutes. ________ with toasts.