You start with heating the chicken broth & saffron & keep it aside for later use.In a paella pan heat olive oil & saute chicken till it is brown & cooked,add salt & paprika to it,add few onion slices to avoid spattering,now add 1/2 of the garlic.When garlic turns light brown,remove chicken & add shrimps to it.Cook it until orange,take out shrimps & keep it aside.Now add remaining onion,parsley,garlic & red pepper.Saute until soft.Now add rice,stir to glaze with oil. Add broth, little at a time, bring to boil after each addition. Salt to taste. Arrange chicken on top. Add scrubbed mussels. Arrange shrimp and squid on top. Scatter peas last on top. Cover loosely with foil. Continue cooking until all liquid is absorbed, rice is fluffy and mussels have opened. The juice of the lemons is sprinkled on the rice at the table.