Preheat oven to 400°F. Slice the top off the garlic head, drizzle with olive oil, wrap in foil, and roast for ~35 minutes until soft and golden.
While garlic roasts, heat a drizzle of olive oil in a skillet over medium-low heat. Add shallots and cook slowly until deeply caramelized—about 15–20 minutes.
Squeeze roasted garlic cloves into a bowl and mash with a fork. Stir in crème fraîche, lemon zest, lemon juice, and caramelized shallots. Season with salt and pepper.
Chill briefly or serve at room temp with crostini, sliced cucumbers, or roasted carrots.
Enjoy!