Ingredients

• 2 tablespoons olive oil
• 1 sweet onion, thinly sliced
• 2 garlic cloves, smashed
• 1 tablespoon lemon zest
• 2 tablespoons lemon juice
• salt & freshly ground black pepper
• 1 tablespoon mustard seeds
• 4 cups kale, trimmed and roughly chopped
• 4 cups collard greens, trimmed and roughly chopped
• 4 cups swiss chard, trimmed and roughly chopped (if not all available, use all of one or two or a mixture of spinach,oriental or regular bok choy, al)
• 1/2 cup pecans, toasted and chopped
• 1 (8 ounce) package puff pastry, thawed
• 1 teaspoon coarse salt
• 1 egg, lightly beaten