Heat The Peanut Oil In A Large Skillet Over Medium Heat Until The Oil Just Begins To Smoke; Cook And Stir The Onion, Garlic, And Salt In The Hot Oil Until The Onions Are Translucent, About 2 Minutes. Stir The Watermelon Rind, Red Bell Pepper, And About Half The Vegetable Broth Into The Onion Mixture. Reduce Heat To Low. Place A Cover Over The Skillet And Simmer The Mixture For 5 Minutes. Whisk The Remaining Vegetable Broth, The Teriyaki Sauce, And Cornstarch Together In A Small Bowl; Stir Into The Mixture In The Skillet And Cook Until The Mixture Begins To Thicken. Serve Hot.