Alicia Silverstone's baby food tips are for the birds! In a video posted to her website, the 35-year-old actress and vegan demonstrates that her son Bear Blu, 10 months, eats food that she's "pre-chewed" and spits into his mouth. "I just had a delicious breakfast of miso soup, collards and radish steamed and drizzled with flax oil, cast iron mochi with nori wrapped outside, and some grated daikon. Yum!" she wrote on her website The Kind Life. Explains the Clueless star: "I fed Bear the mochi and a tiny bit of veggies from the soup ... from my mouth to...