Zucchini, tomato and basil pasta bake

Ingredients

• 6 medium zucchini, halved lengthways, sliced
• 1 large onion, chopped
• 2 stalks celery, sliced
• 2 250g punnets cherry tomatoes (one red, one yellow), halved
• 1/4 teaspoon chilli flakes
• 1/4 cup olive oil
• 500 gram penne, or other short pasta of choice
• few handfuls basil leaves, torn
• 1 1/4 cup grated pecorino