April teases with tastes of warm weather, hinting at delightful days ahead and sparking plans for spring and summer. And LongHorn Steakhouse tantalizes those eager to begin grilling outdoors with a trio of new toppings for its Flo's Filet.Long one of the most popular items on the LongHorn menu, the tender, center-cut filet now can be ordered topped with smoked bacon and a bourbon brown sugar glaze; with roasted shiitake mushrooms, toasted breadcrumbs and a garlic cream sauce; or crusted with a creamy parmesan, provolone and garlic cheese.