Preheat oven to 400.
Place feta in a small oiled casserole dish with rosemary scattered on top.
Bake until warm throughout, about 20 minutes.
Meanwhile - pulse kale, pine nuts and garlic in a food processor until finely chopped.
With motor running, drizzle in oil and lemon juice to make a pesto.
Spoon pesto around feta and bake for 5 minutes more.
Serve with baguette slices
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