Butternut Squash Fritters with Spiced Yogurt

For the Fritters:

• 1 ~2-lb butternut squash peeled, seeded and grated on a box grater*
• 1 medium-large yellow or sweet onion halved, peeled and sliced as thin as possible*
• 4 tablespoons olive oil divided
• ¾ cup chick pea flour
• 2 tablespoons corn starch
• 1 teaspoon baking powder
• 1 teaspoon salt
• freshly ground black pepper to taste
• 1 egg
• Flaky sea salt such as Maldon, for sprinkling

For the Spiced Yogurt:

• ¾ cup plain whole milk Greek yogurt
• 1 small garlic clove very finely minced
• ½ teaspoon cumin
• ½ teaspoon Coriander
• ½ teaspoon smoked paprika
• ½ teaspoon salt
• 2 teaspoons lime juice