Add the garlic cloves and a block of feta to a baking dish with the olive oil, a pinch of salt and the red pepper flakes. Bake at 400 F until the garlic is tender and golden.
Gently mash the softened garlic with the back of a fork, then stir it through the feta.
Add the cooked orzo, spinach, lemon juice and a splash of pasta water; stir until silky and smooth.
Finish with a drizzle of white balsamic glaze and fresh cracked pepper.