1.
Preheat oven to 350°F. Spray a muffin tin with non-stick cooking pray or line it tin with parchment paper cups. I prefer the parchment paper cups over traditional ones.
2.
Combine the flour, sugar, baking powder, baking soda and salt. Beat egg and oil together until well mixed; add orange juice.
3.
Pour egg mixture into dry ingredients. Mix until just combined. Gently fold in rhubarb and nuts.
4.
Bake at 350°F for 25 - 30 minutes. Cool 10 minutes in tin; remove and serve warm or cool completely.
1.
If using frozen rhubarb, measure rhubarb while still frozen, then thaw completely. Drain in a colander, but do not press liquid out.