1. Combine rye flour, pumpkin seeds, and chia seeds in a large mixing bowl.

2. Add baking soda, salt, and spices and mix well.

3. In a separate bowl mix light syrup and sour cream.

4. Add the wet ingredients to the dry ingredients and mix until a sticky dough forms.

5. Knead the dough for about 10 minutes until it becomes smooth.

6. Divide the dough into 2-3 equal parts depending on how large you want your loaves to be.

7. Shape each part into a round or oblong loaf.

8. Place the loaves on a baking sheet lined with parchment paper leaving about 2.5 cm or 1 inch of space between each loaf.

9. Bake in a preheated oven at 190°C or 375°F for about 35-40 minutes or until the loaves are golden brown and sound hollow when tapped on the bottom.

10. Let the loaves cool on a wire rack before slicing and serving.