Best Healthy Bran Muffin (nut-free, lunchbox friendly, meal prep!)

• 1.5 cup bran cereal*
• 1 cup self-raising flour
• 2 tsp baking powder
• 1 tbsp cinnamon
• 10 Medjool dates pitted
• 2 tbsp honey (or maple syrup)
• 2 tsp vanilla
• 2 free-range eggs
• 0.3 cup extra virgin olive oil
• 0.5 cup plain Greek yoghurt