Cook beetroot in a medium saucepan of boiling water until tender. Drain. Peel and thinly slice.
Meanwhile, heat oil in a medium saucepan over medium-high heat. Cook onion, stirring, for 15 minutes or until golden and lightly caramelised. Stir in three-quarters of the thyme. Season.
Preheat oven to 200°C/180°C fan-forced.
Combine goats cheese and crème fraiche in a small bowl. Season.
Spray each filo sheet with oil and layer on top of each other. Lay into a 20 x 30cm slice pan, folding in ends. Prick base with a fork. Spray top with oil. Bake for 10 minutes.
Spread goats cheese mixture over pastry base. Scatter with onions, then top with beetroot slices. Bake for 20-25 minutes or until golden.
Drizzle with honey, then scatter with hazelnuts, spinach, mint and remaining thyme. Serve cut into pieces.
Notes
You can use pre-cooked beetroot if you prefer. If using beetroot from a bunch, reserve the small beetroot leaves and use them to garnish the pizza with the spinach leaves.Just replace the beetroot with these other vegetables for some simple variations:PUMPKIN: Replace beetroot with 400g peeled, thinly sliced, baked pumpkin. Bake pumpkin at 200C/180C for about 20 mins before using.MUSHROOM: Replace beetroot with 3-4 large portobello mushrooms. Thinly slice and pan-fry with a couple cloves sliced garlic before using.CARROT: Replace beetroot with 1-2 carrots that have been thinly sliced (cut into ribbons with a peeler).SPINACH: Replace beetroot with 250g baby spinach leaves. Pan-fry with a couple of thinly sliced garlic cloves. Cool slightly. Squeeze out excess liquid then stir into creme fraiche mixture.