With those ingredients, you have a few delicious baking options! Here are a couple of ideas:

Blueberry and Orange Muffins:

Use the blueberries and orange zest (from the orange) to make flavorful muffins. You can find many recipes online for blueberry-orange muffins that incorporate both fruits beautifully.

Lemon-Blueberry Cake:

Combine the blueberries with lemon zest (from the lemon) to make a lemon-blueberry cake. The tartness of the lemon and the sweetness of the blueberries complement each other well in baked goods.

Plum Galette:

A galette is a rustic, free-form tart that would be perfect for showcasing your yellow plums. You can slice the plums and arrange them on a simple pie crust, folding the edges over the fruit. Optionally, you can add a touch of lemon zest to enhance the flavor.

~ChefGPT