Grilled Polenta and Veggies

Name: Grilled Polenta and Veggies
Ingredients: 1/2 cup extra-virgin olive oil; 1/4 cup chopped fresh herbs (basil, mint and/or parsley); 1 tablespoon ground coriander; Freshly ground pepper; 1 bulb fennel, fronds chopped and base cut into 8 wedges; 1 bunch broccoli, cut into florets (with some stems attached); Kosher salt; 2 oranges, cut crosswise into thick slices; 2 large beefsteak tomatoes, halved crosswise; 4 portobello mushroom caps; 1 large head radicchio, quartered; 1 1-pound tube prepared polenta, cut into 8 slices; 1/2 pound haloumi cheese, cut into 4 slices