Another colleague told me his wife freezes herbs mixed with butter or olive oil and also freezes homemade stock this way. I too make up garlic butter mixed with parsley, or butter mixed with capers to add to any fresh fish I am cooking. In the past I have made pasta sauce and frozen it in ice cube trays as when my youngest was little, he was crazy for pasta but only ate small amounts. This is very similar to the way you freeze baby food which I also did.
Pesto: I also make homemade pesto which can go brown in the fridge when exposed to the air so I pop it into ice cube trays and freeze it. Again, pesto is one of those foods where you don't always need a lot of it in one serving. It's great added to chicken breasts before covering them in tin foil and popping them in the oven.
Buying in bulk is always cheaper so when I am making a Thai curry I prepare extra chillies, onions, lemon grass, ginger and garlic mixed with either olive oil or coconut oil pop it in the freezer in ice cube trays knowing it will save me a lot of time and money the next time I make a Thai curry.
Click here for more ideas on how to use ice cube trays.
To save space in the freezer, once frozen empty the cubes into plastic bags.