1 sweet potato, peeled and diced

4 baby yellow potatoes, quartered

1/2 cup oil, such as Gefen Cottonseed Oil, divided

1 teaspoon salt, divided

1 butternut squash, peeled and diced

1 zucchini, peeled and diced

1 large red onion, thinly sliced

6 to 8 cups chopped lettuce

1/3 cup toasted walnuts

sliced radish, for garnish

3/4 cup oil, such as Gefen Cottonseed Oil

1/4 cup Gefen Lemon Juice

1 teaspoon Haddar Kosher Salt, or to taste

1/2 teaspoon ground Gefen Black Pepper, or to taste