Harissa Shrimp And Summer Vegetable Sauté

Name: Harissa Shrimp And Summer Vegetable Sauté
Ingredients: 1/4 teaspoon cayenne pepper; 1 teaspoon smoked paprika; 1 teaspoon chili powder; 1/2 teaspoon garlic powder; 1/2 teaspoon ground coriander; 1/2 teaspoon ground cumin; 1 tablespoon olive oil; 1 pound medium shrimp, peeled and deveined; 2 tablespoons canola oil, divided; 1 lemon, 1/2 cut into wafer-thin slices and 1/2 juiced; 2 zucchini, thinly sliced on the diagonal and halved; 1 fennel bulb, thinly sliced, plus 1 tablespoon fronds; 1 cup wax beans; 1 cup green beans; 1 cup snap peas, sliced in half on the diagonal; 1/2 cup fresh or frozen peas; A few handfuls of pea shoots; 4 cups cooked rice