Grease 8x4-inch loaf pan. Line pan with parchment paper across bottom and extending up over long sides of pan; set aside.
Combine flour blend, amaranth flour, teff flour, yeast, xanthan gum and salt in large bowl; mix well.
Combine warmed milk, melted butter, eggs, honey and vinegar with wire whisk in another large bowl; mix well. Add flour mixture gradually to milk mixture, beating well after each addition. Add millet, pumpkin seeds, sunflower seeds and flax; mix well.
Spoon bread dough into prepared pan. Smooth top of dough with greased fingers. Cover with lightly greased plastic food wrap. Let rise in warm place until bread reaches top of pan (30 to 45 minutes).
Heat oven to 375°F. Uncover bread; bake for 35 to 40 minutes or until bread is brown and sounds hollow when tapped. Remove bread from pan, keeping parchment paper on bottom of bread. Place bread with parchment paper directly onto oven rack; bake for 5 minutes. Remove from oven; cool on wire rack. Remove parchment paper.
*This recipe was developed using alternative flours and other products labeled as "gluten-free". To date, the FDA and USDA have not defined the term "gluten-free." Therefore, to the best of our knowledge, the ingredients in our Process Cheese (example: American Process Cheese) and our natural dairy products (examples: natural cheese and butter) do not contain gluten.
Multi-Grain Gluten-Free Flour Blend: Stir together 2 cups cornstarch, 2 cups potato starch, 1 3/4 cups brown rice flour, 1 1/2 cups garbanzo bean flour, 1 cup sorghum flour, 1 cup tapioca flour and 1/4 cup teff flour. Use appropriate amount for recipe; store remainder in container with tight-fitting lid. Stir before using.