Place the pancetta in a skillet over medium heat. Cook until the pancetta is browned and crisp. Transfer to a paper towel with a slotted spoon to drain.
Rub baguette slices with garlic clove. Drizzle with olive oil and broil until just crisp, but not starting to brown, flipping each piece over to the other side, about 5 minutes.
Spread about a teaspoon of goat cheese atop the toasted baguette slices; add salt and pepper. Top with pancetta, a few slices of radish, microgreens, and fresh chives.
Place crostini on platter and serve.