Mash avocado in a small bowl and season with salt and freshly ground pepper. Top toasted crusty bread slices with a layer of mashed avocado, a heaping spoonful of bacon jam, and a poached egg. Sprinkle egg with Kosher salt and freshly ground black pepper. Devour.
for the Bacon Jam
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.
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/juice, 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 it becomes too dry, add apple cider/juice or water, 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.
Let cool and then pulse in food processor or with immersion blender to desired consistency. This will make much more than you need for this avocado toast. Store in refrigerator for several days or freeze. Serve it as a condiment for meats with dinner, with a cheese board, or as part of an epic crostini.