Set up a double boiler with water at a low simmer and add chocolate chips to the top pot, stirring until they melt.
Or, do like me and risk burning the chocolate chips over a very low flame with a single pot. It’s really easy—too easy—to melt chocolate, and it will quickly turn from a pliable ganache into a weirdly solid mass as it burns.
SIf you do like me and roll with a single pot over a flame, I recommend elevating the pot just about the lowest flame possible, and stirring the chips constantly as they melt. You can even add the yogurt in as they’re melting. Add in the remaining ingredients.
Stir continuously until everything is swirly chocolatey deliciously incorporated. Serve in individual bowls and let cool (you can chill—it will harden up quite a bibefore topping with fresh berries.