Prepare calcium bath by dissolving calcium chloride in 4 cups of water. Set aside in a large bowl.

For peanut butter spheres, blend peanut butter with heavy cream until smooth. Dissolve sodium alginate in 1/4 cup warm water and mix into peanut butter mixture until fully incorporated.

Using a hemisphere spoon, carefully drop peanut butter mixture into calcium bath. Let spheres form for 2 minutes, then gently transfer to clean water. Refrigerate until serving.

For grape caviar, place vegetable oil in freezer for 30 minutes. Heat grape jelly until liquid, whisk in agar-agar powder until dissolved.

Using a syringe, drop grape mixture into cold oil to form pearls. Strain pearls and rinse gently with cold water.

For bread tuiles, remove crusts and roll bread slices very thin. Cut into decorative shapes, brush with melted butter, and bake at 350°F until golden and crispy.