Hearty Vegan Mushroom Pastry - With Chestnuts! - Let's Brighten Up

Ingredients

• 1 Teaspoon (4 gr) of Active Dry Yeast
• 1/2 Cup (100 gr) of Tap Water
• 1 Cup (150 gr) of Whole Spelt Flour
• 1 Tablespoon (10 gr) of Olive Oil
• 1/4 Teaspoon (2 gr) of Sea Salt
• 2 Tablespoons of Olive Oil
• 1 + 1/3 Cups (180 gr) of Diced Red Onion
• 2 + 1/4 Cups (200 gr) of Diced Mushrooms
• 4 Garlic Cloves
• 10 Fresh Thyme Sprigs
• Sea Salt to taste
• 1/2 Teaspoon of Ground Black Pepper
• 1/2 Cup (80 gr) of peeled Vacuumed Chestnuts