Spritz a 9-inch round baking dish with cooking spray. (I used a pie dish but any shallow baking dish with at least a 5-cup volume will work.)
Add the ricotta cheese, egg, lemon juice, thyme, salt, and black pepper into the bowl of a food processor. Blend for 2 minutes or until smooth and creamy.
Pour into the baking dish and distribute the blackberries over the top of the ricotta. They should rest lightly on top, only sinking in slightly.
Bake for 30 minutes until the blackberries are runny and the cheese is bubbly and lightly browned.
Drizzle with honey and garnish with additional thyme.
Serve immediately with toasted baguette slices or crackers.