Best hot artichoke spinach dip

can artichoke hearts (squeezed dry using cheese cloth or tea towel, and chopped)

fresh baby spinach leaves (chopped into 1/2-inch wide strips)

shredded mozzarella cheese (plus another 1/4 cup for sprinkling on top)

shredded asiago cheese

jalapeños (seeds and membranes removed, and diced)

garlic (minced)

mayonnaise

dried oregano

salt

pepper