Lacto Beets & Fennel with Orange

Ingredients

• 3½ pounds beets, 2 to 2½ inches in diameter
• 1 cup thinly sliced fennel, feathery fronds saved for another use
• 1 cup thinly sliced red onion
• Grated zest of 1 orange
• 2 garlic cloves, peeled and sliced
• 1 teaspoon fennel seeds
• 1 teaspoon cumin seeds
• 1 stick cinnamon, broken in half
• 75 grams (about 6 tablespoons) fine sea salt or pickling salt
• 1.5 liters (about 6 cups) water