Caramelize onion & feta muffin

Have not been baking for some time, and my baking mood is back now!! My 1st time having savory muffin (Caramelize onion & feta muffin) was during my last trip in Adelaide, and it was so yummyyyyy.... This is my version of Caramelize onion & feta muffin, infused with rosemary, taste good and smells nice... Are you drooling? :p