Preheat the oven at 190°C. Mix the crumble ingredients together, and then pour into a glass dish and cook in the oven for 15 minutes (At 10 minutes stir the crumble around to make sure it cooks evenly).
Slice all the vegetables and brown them in a pan with a little olive oil and garlic. Season to taste.
Once cooked, pour into a Pyrex® glass dish and then sprinkle the crumble on top.