While many of us slather our toast with butter day-after-day, Manami Sasaki is transforming thick slices of bread into Zen Japanese rock gardens and Pantone swatches that make breakfast into the most jubilant meal of the day. A watercolor artist turned toast connoisseur, the Japanese designer combines the stocks available in her fridge and pantry to assemble delightful bread-based creations. In a patch of flowers, she adorns a tomato-sauce base with margarine petals and mint leaves that are…