I can't make any sense of this plant in the Food Garden, but in an area that has some ornamental plants. I don't even know if this is ornamental or a food plant. In habit, it reminds me of Impatiens, so Balsaminaceae, the flimsy-looking opposite simple leaves, small clusters of single flowers, coarsely serrated margins resembling those of Impatiens capensis. But I think there are no spurs on the flowers, which look wrong for that genus anyway. The flowers look a bit like Convolvulaceae, completely fused smooth petals. The buds look like Malvaceae, sharp edges coming to a point. The stems are thick like Curcubitaceae, but this is not a vine and there are no tendrils. I'm not finding anything in any of these families that looks like this.