There's saag in my soup!
A green soup inspired by the Indian sarson ka saag (slow cooked mustard greens). 1 lb frozen spinach 10 oz frozen mustard greens 1 tbsp olive oil 1 onion, chopped fine 2 tomatoes, chopped 1 tbsp red pepper flakes 1 tsp oregano 1 tsp thyme 4 cups vegetable stock/water salt to taste (use rock salt for...