French Tomato & Mustard Tart
2 Coeur de Boeuf tomatoes (or 4 large tomatoes)
3-4 tbsp mustard original
1 round store-bought shortcrust pastry (“pâte brisée”)
3 tbsp “herbes de provence”
1 egg (beaten, for egg wash)
1 tablespoon sesame seeds
1 tablespoon olive oil
flaky sea salt
black pepper