Creating Strawberry Rhubarb Muffins can be straightforward if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C). Line a muffin tin with paper liners or grease it lightly.
2. Mix Dry Ingredients: In a large bowl, whisk together the flour, sugar, baking soda, baking powder, and salt until well combined.
3. Combine Wet Ingredients: In another bowl, whisk the egg, vegetable oil, buttermilk, and vanilla extract until smooth.
4. Mix Wet and Dry: Pour the wet ingredients into the dry mixture. Stir gently until just combined; be careful not to overmix.
5. Fold in Fruits: Gently fold in the chopped strawberries and rhubarb until evenly distributed within the batter.
6. Fill Muffin Tin: Spoon the batter into the prepared muffin tin, filling each cup about ¾ full.
7. Bake: Place in the preheated oven and bake for 20-25 minutes or until a toothpick inserted in the center comes out clean.
8. Cool: Remove from the oven and let the muffins cool in the tin for about 10 minutes. Then transfer them to a wire rack to cool completely.

These steps will guide you in creating these delightful muffins effortlessly.