Stir graham cracker crumbs and oil/butter together until combined. Add 2 loosely-packed tablespoons of crust to the bottom of each jar or serving dish, and use your fingers or a spoon to pack it down firmly.

Add all ingredients to a food processor, and pulse to combine, scraping the edges of the bowl once or twice to be sure that all ingredients are blended. Spoon about 2/3 cup of the mixture into each jar or serving dish on top of the graham cracker crust.

Refrigerate for 2-3 hours until set. Serve topped with berries, lemon zest, other desired toppings, or plain.

**Note about the Greek yogurt: It is VERY important that your Greek yogurt is thick for this recipe. If it is too thin, the cheesecake will not set up and will have more of a pudding consistency. I used Fage Total 2% Greek yogurt for mine, and it worked perfectly. But if your Greek yogurt is not thick — for example, if you poke a spoon in it vertically and it falls over — just strain it through a cheesecloth to remove the excess water. Then measure out 1 cup with the Greek yogurt that has been strained.

(However, I should note that even if the cheesecake does not set up perfectly, it will still be delicious!