FOR THE PORK BELLY

1. Place pork belly, fat side up, in small roasting pan or pyrex glass baking dish. Combine sugar and salt in a small bowl and rub all over pork. Cover with plastic wrap and refrigerate for 6 to 24 hours.
2. Heat oven to 450°F. Rinse off pork belly and pat dry with paper towels. Discard any liquid that has accumulated in the roasting pan. Transfer pork in pan to oven and cook for about 1 hour, basting it with the rendered fat halfway through, until it’s golden brown.
3. Reduce heat to 250°F and cook until the pork is tender, about 1 hour. Transfer pork to a plate and let cool. Cover in plastic wrap and refrigerate until it thoroughly chilled. You can skip this step if needed, but it’s the only way to get neatly trimmed slices. Remove pork from refrigerator and slice into 1/2?-1? slices. Heat 1 tablespoon butter or oil in a heavy-bottom skillet over medium-high heat and sear pork belly on both sides until golden brown.

FOR THE BACON-CIDER JAM

1. Cook bacon in a heavy-bottom skillet or dutch oven over medium heat until golden brown and crisp. Remove bacon and drain on paper towels. Once cool, crumble bacon. Reserve 2 tabespoons of bacon drippings in dutch oven and discard the rest.
2. Reduce heat to medium/medium-low. Cook onions, stirring occasionally, for about 7 minutes or until tender. Add garlic and cook, stirring constantly, for 1 minute. Add brown sugar, apple cider, apple cider vinegar, and season with Kosher salt. Bring to a boil, stirring occasionally, and then reduce heat to low. Add bacon and simmer until onions are very soft and the mixture has thickened to the consistency of jam. If too dry, add apple cider, 1/4 cup at a time (I added 1/4 cup total). You want the onions to be meltingly soft and the mixture to be thick and syrupy.
3. Let cool and then pulse in food processor or with immersion blender to desired consistency. This will make much more than you need for one dinner. Store in a refrigerator for several days or freeze. Serve it with any meats, as an appetizer, or with eggs at breakfast!

FOR THE PICKLED APPLES

1. Combine water, vinegar, sugar, salt, peppercorns, and coriander seeds in a small saucepan over medium heat until sugar and salt are fully dissolved. Let cool completely, then pour over apples. Let infuse for at least 2 hours at room temperature or 1 day in the refrigerator.