In an 8x12” baking dish, toss the sundried tomatoes, oil, cherry tomatoes, artichokes, lemon juice, shallot, and garlic cloves together. Add a small pinch of salt and pepper and toss.
Place the feta block into the center of the pan. Bake for 20 minutes.
While baking, cook the orzo about 2 minutes short according to package directions. Reserve about ½ cup of the pasta water.
Take the feta mixture out of the oven and stir to form a sauce. Pour the orzo, ½ cup of pasta water, and chicken into the baking dish. Toss until completely combined. Cover and bake for another 10 minutes or until the orzo is completely cooked through.