Chard and Quinoa Crustless Tart

Name: Chard and Quinoa Crustless Tart
Ingredients: 1 medium bunch chard, stemmed and chopped into small pieces (Reserve the stems and pickle them to serve on the side.); 1 cup chicken stock or broth (You can use water if you want this to be vegetarian.); 1/2 cup quinoa; 1 cup water; 4 large eggs; 1/4 cup Greek yogurt; 4 ounces pecorino romano cheese, finely grated (I used a microplane); 1/4 cup golden raisins; 1 generous pinch red pepper flakes; 2 tablespoons pine nuts; 1/4 teaspoon flaky sea salt